Metered-dose aerosol valves
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United States of America Patent
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-
Dec 26, 1995
Grant Date -
N/A
app pub date -
Mar 23, 1994
filing date -
Mar 23, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Metered dose dispensing valves providing good dosage reproducibility with formulations having a propensity to cream and with low concentration formulations. Valves having a tank retaining cup have a small inlet aperture of no more than 0.7 mm and preferably the tank retaining cup follows the configuration of the end of the valve stem. Valves having a bottle emptier attached to the valve stem have a filling channel in the valve stem which protrudes only slightly from the metering chamber when the valve is in its inoperative position.
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